I just love this little film. It handles the delicate subject matter of dealing with mental disability very carefully, but also without pulling any punches. It's raw, tender and very realistic without a happy Hollywood ending. The parents of the main character (wonderfully played - as always- by Christopher Eccleston) are not played by actors, but by real people with learning disabilities. This was obviously a very daring choice. It could have very easily turned out badly, but in this film it works beautifully. I never got any sense that these two people were being taken advantage off in any way.
The commentary sheds light on how shooting the scenes between skilled actors and people who were just being themselves worked. The delicate and considering way in which this was obviously done is very admirable. I especially loved Christopher Ecclestons commentary, he seemed so genuinely fond of the people playing his real mom and dad.